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Finding the Fourth Proportional to 20,877.94, 28,811.52 and 11,447.11

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Solution

The fourth proportional to 20,877.94, 28,811.52 and 11,447.11 is: 15,796.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.94 : 28,811.52 = 11,447.11 : x
  2. Step 2: Convert to fraction form
    20,877.94/28,811.52 = 11,447.11/x
  3. Step 3: Cross multiply
    20,877.94x = 28,811.52 × 11,447.11
  4. Step 4: Simplify right side
    20,877.94x = 329,808,638.71
  5. Step 5: Solve for x
    x = 329,808,638.71/20,877.94
  6. Step 6: Final answer
    x = 15,796.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.